No boss in Farportal levels

[ghostbuster]

If the farportal levels are of small size, it main happen that no boss are generated in the last level.
I think this has alreay been reported for previous betas, but it seems that the bug is still there in B41.
Also, I have experienced a farportal level that whose generation timewas too long. So long that I just killed the process. It was also in a farportal donjon with tiny levels.